1001102121020 has 36 divisors (see below), whose sum is σ = 2233254467640. Its totient is φ = 376885502208.

The previous prime is 1001102121007. The next prime is 1001102121029. The reversal of 1001102121020 is 201212011001.

It is a junction number, because it is equal to n+sod(n) for n = 1001102120992 and 1001102121010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001102121029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86594750 + ... + 86606309.

Almost surely, 2^{1001102121020} is an apocalyptic number.

1001102121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001102121020 is an abundant number, since it is smaller than the sum of its proper divisors (1232152346620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1001102121020 is a wasteful number, since it uses less digits than its factorization.

1001102121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173201102 (or 173201083 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1001102121020 its reverse (201212011001), we get a palindrome (1202314132021).

The spelling of 1001102121020 in words is "one trillion, one billion, one hundred two million, one hundred twenty-one thousand, twenty".